You can't learn to speak J.R.R. Tolkien's Elvish, because he didn't want you to
Briefly

Tolkien's Elvish languages, Quenya and Sindarin, are critical to his mythology yet were never fully developed for fluent conversation, serving more as personal constructs.
In 'A Secret Vice,' Tolkien first unveiled his Elvish languages, laying the groundwork for a rich linguistic culture that remains integral to his storytelling.
Read at Polygon
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